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From: Sergey Zaikov <Sergey_Zaikov@p66.f5.klax.tsu.tula.ru>
Date: Sun, 09 Nov 2003 16:44:44 +0300
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Subject: Strangeness at the drive naming and numering
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                   Hello, Questions@freebsd.Org!!!

Sametimes ago I has two hard drives:

Oct 30 08^34^06 acc |kernel^ ad0^ 38162MB <Maxtor 6E040L0> [77536|16|63] at
ata0-master UDMA33
Oct 30 08^34^06 acc |kernel^ ad1^ 38166MB <ST340016A> [77545|16|63] at
ata1-slave UDMA33

Is all correct? I think that the names must be ad0 and ad3.

Later, I has connected a CD-ROM:

Nov  4 13^45^14 acc |kernel^ ad0^ DMA limited to UDMA33? non-ATA66 cable or
device
Nov  4 13^45^14 acc |kernel^ ad0^ 38162MB <Maxtor 6E040L0> [77536|16|63] at
ata0-master UDMA33
Nov  4 13^45^14 acc |kernel^ ad1^ 38166MB <ST340016A>[77545|16|63] at
ata1-slave UDMA33
Nov  4 13^45^14 acc |kernel^ acd0^ CDROM <ATAPI CD-ROM DRIVE 40X MAXIMUM> at
ata0-slave PIO4

Well, nothing strange.

Than I try using the ATAPI/CAM Driver (according Handbook: 12.5.9 Using the
ATAPI/CAM Driver). Rebuild and install new kernel.

Than I see:
The drive "ad1" be named as "ad3"!

What I do wrong?

uname  -a:
 FreeBSD acc.acc.tula.ru 4.8-RELEASE FreeBSD 4.8-RELEASE #12: Sun Nov 9
13:24:23 MSK 2003     acc107_3@acc.acc.tula.ru:/usr/obj/usr/src/sys/Z  i386

                                                          Sergey.